Display screen with a user interface



FIG. 1 is a front view of the display screen with a user interface showing our new design; and,

FIG. 2 is a front view of another embodiment of the display screen with a user interface showing our new design.

The broken line showings of the display screen and portions of the user interface are for the purpose of illustrating unclaimed portions of the display screen with a user interface and form no part of the claimed design. 

The ornamental design for a display screen with a user interface, as shown and described. 